Automobile-governor.



J. M. MACDONALD.

AUTOMOBILE GOVERNOR.

APPLICATION I'ILIIDSEPT. 13, 1910.

mu fi m w m i 5x J 0 P a M 7M wsnzs fl m 4 I I I II II, a w 3 (E J m /MW W J. M. MACDONALD.

AUTOMOBILE GOVERNOR.

APPLICATION FILED $32113. 1910.

Patented Dec. 10, 1912.

2 SHEETS-SHEET 2.

UNITED STATE8 PATENT OFFICE. T

, JAIWZE'JS IMIZ. MACDONALD, OF WETHERSFIELD, CONNECTICUT.

. AUTOMOBILE-GOVERNOR.

To all whom it may concern:

Be it known that I, J AMES M. MAoDoNALD, a citizen of the United States,residing at Wethersfield, in the county ofHartford and. State ofConnecticut, have invented new and useful Improvements inAutomobile-Gov- Y ernors, of which the following is a specification.

In the operation of mechanically propelled vehicles high speed isfrequently attained, the same exceeding that prescribed by municipalregulations and thisspeeding of the machine besides being dangerousshortens the life or eriod of usefulness of the machines? partic iiarlywhen operated-on rough roads. a

The purpose of the present invention is the provision of an automaticgovernor of Referring to the drawings, forming a part.

of the application, Figure 1 is a dla ainmatic view'of "a governorconstructed 1n accordance with this invention.

Fi 2 is 'a detailsecjtion on the line H 0 .Figs'. 1 and 2. Fig. 3 is asectional view of the casing containing the pump and diaphragm. Fig. 4is a longitudinal section of the cylinder and plunger connected with thevalve for controlling the'supply to the engine.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views of the drawings, by

the same reference characters.

The governor mechanism comprises a casing 1, which is closed or providedat one end with a chamber containing a diaphragm 2. Thechamber is formedbetween two members 3 and glywhich are secured together at their outeredges and fitted to an end portion of the casing 1. The diaphragm 2 isconfined between the outer portions of the members 3 and 4. The member'4hasits inner portion recessed, as indicated at 5, the re,-' cessedportion being closed at its open end by means of a cap plate 6. Rotarypump i Specification-o1 Letters Patent. Application filed September-'13;"1910. Serial No. 581,742.,

. forms an outletbetween the i Patented Dec. 10, 19 12.

the recess 5. and are adapted to draw a liqe uidv from the casing 1 andforce the same into the dia hragm chamber formed between the par s 3 and4. The recessed portion of the member 4 andthe elements 7 and 8 form arota-ry'pum An inlet 9'estabfishes-communication etween the casing 1 andthe interior of the pump. A passage 10 pump and the diaphragm chamber.When the'pump is in operationliquid is drawn into the pump through theopening 9 and.is discharged through the passage 10. The chamber '11formed between the-members3 and 4 has an outlet 12, which is of smallercross sectional area than e passage 10, so that it is ossible to sup yliquid to the chamber 11 aster than 1t can escape from said chamberthrough the outlet 12. The diaphragm 2 divides the chamber 11 into twospaces and members? and 8 are agranged to operate in any GXCGSSiX'Gpressure in the space tothe right of the diaphragm 2 causes a deflectionof said diaphragm to the-left, the degree of deflection beingproportionate to the excessive pressure in the space upon the rightpressure may be created in the diaphra chamber upon the right hand sideof the diaphragm. The pump is adapted to be op.-.

erated from a rotating part of the machine a shaft '14 connecting one ofthe pump ele- ,ments with the rotatingfpart. The intake manifold of theengine isindicated at 15 and 16 desi ates a pipe connected with'themanifold o'rjsupplying gaseous mixture'thereto. A valve 17 located inthe hand side of the diaphragm. A valve 13' is fitted to the' pipeforming the outlet 12, thereby admitting of reducing the effective sizeof the outlet 12 so that a greater or less pipe 16 controls the amountof gaseous mix- -ture passing therethrough in a given time.

A cylinder 18 has apiston 19 arranged to operate therein, and a stem 20of the piston 19 is connected with the valve 17 to effect movementthereof. A spring 21 normally 1 exerts'an endwise pressure upon theplston 19 to move the same toward the outer or left hand end'of'thecylinder 18, so as to open the valve 17 to its fullest extent. A pipe 22connects one. end of the cylinder 18 with the diaphragm chamber.Liq'uidis supplied to the pipe 22, the outer end of the cylinder 18 andthe outer or left hand space of the diaphragm chamber 11. When thediaphragm 2 isdeflected outwardly pressure is trans r valve 17 to agreater or less extent depending upon the degree of deflection of thediaphragm 2. A spring 23 arranged in the outer or left hand space of thechamber 11 sure upon the serves to press the diaphragm 2 toward theright andto return the same to normal position when relieved from anyexcessive presright'hand side of the chamber 11.

The parts of the governor mechanism may be conveniently located andhoused and made secure to prevent any one tampering therewith so thatafter the mechanism has been set for a predetermined speed the lattermay not be exceeded. The opening 9 corresponds in-size to the passage10, hence when the pump is in operation the liquid drawn in at theopening 9 may pass out through the passage 10. The passage 12 beingsmaller than the passage 10 it will be understood that in the event ofthe pump operating so as to supply liquid to the chamber 11 faster thanit may pass from said chamber through the outlet 12 there will be' anaccumulation in the right hand space of the chamber 11 which will resultin" deflecting the diaphragm-2 and compressing the liquid in the lefthand space of the chamber 11, thereby bausing a movement of the piston19in the cylinder 18, with the result that the valve 17 is moved topartly close the opening through the pipe 16 and thereby cut 011 aportion of thesupply of gaseous mixtureto the engine.

The speed of the engine is thus reduced. Under normal conditions thediaphragm 2 occupies a givenposition and the valve 17 is held at a givenpoint and the position of these parts is maintained so long as the vehicle does not exceed a given speed, but should the pump operate to supplyliquid to the chamber 11 faster. than the liquid may escape from saidchamber through the outlet 12 the governor mechanism Wlll come into playto throttle the engine and compensate for the tendency to exceed thepredetermined speed, which latter is maintained so long as the liquid issupplied to the chamber 11 faster than it can escape therefrom throughthe outlet 12.

From the foregoing descriptioh, taken in connection with theaccompanying drawings, the advantages of the construction and of themethod of operation will be readily apparent to those skilled in the artto which the invention appertains, and while I have described theprinciple of operation of the invention, together with the device whichI now consider to be the embodiment thereof, I desire to have itunderstood that the device shown is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claimappended hereto.

Having thus described the invention what is claimed as new, is

A governor mechanism comprising a cyllnder, a piston arranged to operatewithin the cylinder and adapted to be connected with the part to beoperated, a chamber con nected with said cylinder and having a valvecontrolled outlet, a diaphragm extended across said chamber, a pump forsupplying liquid to the chamber upon that side of the diaphragm havingthe before mentioned valve controlled outlet, and means for operatingthe pump.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES M. MACDONALD.

Witnesses: ALLEN R. PYE,

SADIE F. PEVINE.

